September 2,2008 a group of people hiking in a group called Mt.Ugnayan went missing, and few months later their bones and other body parts are found in the woods with scribbles and texts written with blood in an unknown language. The story went viral only after it followed by a hundred more cases the following years. 5 more years has passed since the last case, the place where the corpse remains are found are now filled with security cameras and military pawns guarding the place, the number of the corpses being found only skyrocketed. In a mountain nearby, a funpark was built, it has a successful run until the owner moved the part in other locations, the tunnel that was supposed to be a shortcut route heading to the next city was now filled with rumors and thus gained the title "Street 483". The main character, Iris Costales, just moved into the next city, but since her uncle won't be coming for her today she have to walk alone tonight. Being knowledgeable enough about the existance of the funpark and the tunnel. Despite the warning of her co-workers, she was left with no other choice but take the shortest route.